Find out the best time to take vitamins to increase their benefits, including the best time to take vitamins D, B12 and C, multivitamins and prenatal vitamins. Create your personalized supplement schedule with AI. Optimize when to take vitamins, pre-workout, creatine, and more for maximum absorption. Free supplement timing tool used by 10,000+ fitness enthusiasts. Use this simple vitamin schedule template to organize morning, afternoon, and evening supplements, set reminders, track doses, and know when to refill. Scroll to Top. Learn how to build a simple supplement timing schedule for vitamin D, iron, calcium, magnesium, zinc, multivitamins, and fish oil. What is the best time of day to take vitamins? Should you space them out over the day? We discuss these issues and more. Vitamin C boosts iron absorption by about 65%. Calcium blocks it by 50 to 60%. The complete timing chart for 18 vitamins and supplements plus 6 conflicts to avoid. Learn the strategic scheduling required to maximize vitamin absorption and supplement effectiveness. The best time of day to take vitamins depends on the type and its effects on the body. For optimal absorption, taking them at mealtime is sometimes recommended. You can print out a copy of the weekly vitamin schedule here. Then, reference the directions on your vitamin bottles to find out when each of your vitamins should be taken, and fill in the printable vitamin schedule accordingly.